> ## Documentation Index > Fetch the complete documentation index at: https://docs.metriport.com/llms.txt > Use this file to discover all available pages before exploring further. # ServiceRequest > A record of a request for service such as diagnostic investigations, treatments, or operations to be performed. ## Properties | Name | Required | Type | Description | | --------------------- | -------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------ | | identifier | No | [Identifier](/medical-api/fhir/data-types/identifier)\[] | Identifiers assigned to this order | | instantiatesCanonical | No | canonical\[] | Instantiates FHIR protocol or definition | | instantiatesUri | No | uri\[] | Instantiates external protocol or definition | | basedOn | No | Reference\<[CarePlan](/medical-api/fhir/resources/careplan) / [ServiceRequest](/medical-api/fhir/resources/servicerequest) / [MedicationRequest](/medical-api/fhir/resources/medicationrequest)>\[] | What request fulfills | | replaces | No | Reference\<[ServiceRequest](/medical-api/fhir/resources/servicerequest)>\[] | What request replaces | | requisition | No | [Identifier](/medical-api/fhir/data-types/identifier) | Composite Request ID | | status | Yes | code | draft / active / on-hold / revoked / completed / entered-in-error / unknown | | intent | Yes | code | proposal / plan / directive / order / original-order / reflex-order / filler-order / instance-order / option | | category | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)\[] | Classification of service | | priority | No | code | routine / urgent / asap / stat | | doNotPerform | No | boolean | True if service/procedure should not be performed | | code | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | What is being requested/ordered | | orderDetail | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)\[] | Additional order information | | quantity\[x] | No | [Quantity](/medical-api/fhir/data-types/quantity), [Ratio](/medical-api/fhir/data-types/ratio), [Range](/medical-api/fhir/data-types/range) | Service amount | | subject | Yes | Reference\<[Patient](/medical-api/fhir/resources/patient) / [Group](/medical-api/fhir/resources/group) / [Location](/medical-api/fhir/resources/location) / [Device](/medical-api/fhir/resources/device)> | Individual or Entity the service is ordered for | | encounter | No | Reference\<[Encounter](/medical-api/fhir/resources/encounter)> | Encounter in which the request was created | | occurrence\[x] | No | dateTime, [Period](/medical-api/fhir/data-types/period), [Timing](/medical-api/fhir/data-types/timing) | When service should occur | | asNeeded\[x] | No | boolean, [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | Preconditions for service | | authoredOn | No | dateTime | Date request signed | | requester | No | Reference\<[Practitioner](/medical-api/fhir/resources/practitioner) / [PractitionerRole](/medical-api/fhir/resources/practitionerrole) / [Organization](/medical-api/fhir/resources/organization) / [Patient](/medical-api/fhir/resources/patient) / [RelatedPerson](/medical-api/fhir/resources/relatedperson) / [Device](/medical-api/fhir/resources/device)> | Who/what is requesting service | | performerType | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | Performer role | | performer | No | Reference\<[Practitioner](/medical-api/fhir/resources/practitioner) / [PractitionerRole](/medical-api/fhir/resources/practitionerrole) / [Organization](/medical-api/fhir/resources/organization) / [CareTeam](/medical-api/fhir/resources/careteam) / [HealthcareService](/medical-api/fhir/resources/healthcareservice) / [Patient](/medical-api/fhir/resources/patient) / [Device](/medical-api/fhir/resources/device) / [RelatedPerson](/medical-api/fhir/resources/relatedperson)>\[] | Requested performer | | locationCode | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)\[] | Requested location | | locationReference | No | Reference\<[Location](/medical-api/fhir/resources/location)>\[] | Requested location | | reasonCode | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)\[] | Explanation/Justification for procedure or service | | reasonReference | No | Reference\<[Condition](/medical-api/fhir/resources/condition) / [Observation](/medical-api/fhir/resources/observation) / [DiagnosticReport](/medical-api/fhir/resources/diagnosticreport) / [DocumentReference](/medical-api/fhir/resources/documentreference)>\[] | Explanation/Justification for service or service | | insurance | No | Reference\<[Coverage](/medical-api/fhir/resources/coverage) / [ClaimResponse](/medical-api/fhir/resources/claimresponse)>\[] | Associated insurance coverage | | supportingInfo | No | Reference\\[] | Additional clinical information | | specimen | No | Reference\<[Specimen](/medical-api/fhir/resources/specimen)>\[] | Procedure Samples | | bodySite | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)\[] | Location on Body | | note | No | [Annotation](/medical-api/fhir/data-types/annotation)\[] | Comments | | patientInstruction | No | string | Patient or consumer-oriented instructions | | relevantHistory | No | Reference\<[Provenance](/medical-api/fhir/resources/provenance)>\[] | Request provenance | ## Search Parameters | Name | Type | Description | Expression | | ---------------------- | --------- | ------------------------------------------------------------------------------------------------------------ | ------------------------------------ | | code | token | What is being requested/ordered | ServiceRequest.code | | identifier | token | Identifiers assigned to this order | ServiceRequest.identifier | | patient | reference | Search by subject - a patient | ServiceRequest.subject | | encounter | reference | An encounter in which this request is made | ServiceRequest.encounter | | authored | date | Date request signed | ServiceRequest.authoredOn | | based-on | reference | What request fulfills | ServiceRequest.basedOn | | body-site | token | Where procedure is going to be done | ServiceRequest.bodySite | | category | token | Classification of service | ServiceRequest.category | | instantiates-canonical | reference | Instantiates FHIR protocol or definition | ServiceRequest.instantiatesCanonical | | instantiates-uri | uri | Instantiates external protocol or definition | ServiceRequest.instantiatesUri | | intent | token | proposal / plan / directive / order / original-order / reflex-order / filler-order / instance-order / option | ServiceRequest.intent | | occurrence | date | When service should occur | ServiceRequest.occurrence | | order-details | token | Order detail | ServiceRequest.orderDetail.text | | performer | reference | Requested performer | ServiceRequest.performer | | performer-type | token | Performer role | ServiceRequest.performerType | | priority | token | routine / urgent / asap / stat | ServiceRequest.priority | | replaces | reference | What request replaces | ServiceRequest.replaces | | requester | reference | Who/what is requesting service | ServiceRequest.requester | | requisition | token | Composite Request ID | ServiceRequest.requisition | | specimen | reference | Specimen to be tested | ServiceRequest.specimen | | status | token | draft / active / on-hold / revoked / completed / entered-in-error / unknown | ServiceRequest.status | | subject | reference | Search by subject | ServiceRequest.subject | ## Inherited Properties | Name | Required | Type | Description | | ----------------- | -------- | ------------------------------------------------------ | ------------------------------------------------------ | | id | No | string | Logical id of this artifact | | meta | No | [Meta](/medical-api/fhir/data-types/meta) | Metadata about the resource | | implicitRules | No | uri | A set of rules under which this content was created | | language | No | code | Language of the resource content | | text | No | [Narrative](/medical-api/fhir/data-types/narrative) | Text summary of the resource, for human interpretation | | contained | No | Resource\[] | Contained, inline Resources | | extension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Additional content defined by implementations | | modifierExtension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Extensions that cannot be ignored | To view the FHIR specification for this resource, see [ServiceRequest](https://www.hl7.org/fhir/StructureDefinition/ServiceRequest).